4891840 has 28 divisors (see below), whose sum is σ = 11649456. Its totient is φ = 1956608.

The previous prime is 4891823. The next prime is 4891841. The reversal of 4891840 is 481984.

It is a junction number, because it is equal to n+sod(n) for n = 4891796 and 4891805.

It is not an unprimeable number, because it can be changed into a prime (4891841) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7324 + ... + 7963.

It is an arithmetic number, because the mean of its divisors is an integer number (416052).

Almost surely, 2^4891840 is an apocalyptic number.

4891840 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

4891840 is an abundant number, since it is smaller than the sum of its proper divisors (6757616).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

4891840 is a wasteful number, since it uses less digits than its factorization.

4891840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15304 (or 15294 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 34.

The square root of 4891840 is about 2211.7504380015. The cubic root of 4891840 is about 169.7555887983.

The spelling of 4891840 in words is "four million, eight hundred ninety-one thousand, eight hundred forty".